![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
A detailed study of dielectric relaxation phenomenon has been carried out in ferroelectric ceramics based on PbTiO3 system with composition Pb(1-x)La(x)TiO3 (x = 0.15 and 0.27) in the microwave frequency region. The experimental results showed a strong dielectric dispersion on both normal (x = 0.15) and relaxor (x = 0.27) ferroelectric compositions, which appears not only in the ferroelectric phase, but also in the paraelectric one far above the transition temperature. The characteristic frequency increases quickly with the lanthanum content in samples.
Acknowledgements
The authors thank to CAPES, CNPq and FAPESP Brazilian agencies for financial support. The authors also thank Mr. Francisco J. Picon (DF-UFSCar) for technical assistance.